| 摘要 |
PURPOSE:To stably form a bicolor tone on the same plane, by removing a part of a heat resistant coating film applied onto the entire surface of an adornment, forming a heat resistant mask on a part of said separated surface, forming a titanium nitride film on the entire surface, and then removing said coating film and the mask. CONSTITUTION:Heat resistant paint is applied onto the entire surface of a watch-case 1 made of stellite by a dipping method for instance and then dried to form a heat resistant coating film 4. Then, the coating film 4 is removed from the surface by grinding or the like to expose white stellite 3. Heat resistant ink is mask printed onto the part where the stellite 3 on the separated surface is expected to be left, to form a heat resistant mask 5. This case 1 is left standing at an ordinary temp. for a while, tentatively dried at a predetermined temp. for a predetermined time and then completely dried. After said case 1 is washed and dried, a titanium nitride film 6 is applied onto its entire surface by ion plating or the like. Then, the case 1 is immersed in a stripping liquid to peel off the coating film 4 and the mask 5 together with the film 6. Hence, a surface of the film 6 of white stellite 3 is made golden is obtained. |
